// Thud - a dynamic object-oriented language
// Copyright (C) 2009,2010 David H. Hovemeyer <david.hovemeyer@gmail.com>

// This program is free software: you can redistribute it and/or modify
// it under the terms of the GNU General Public License as published by
// the Free Software Foundation, either version 3 of the License, or
// (at your option) any later version.
// 
// This program is distributed in the hope that it will be useful,
// but WITHOUT ANY WARRANTY; without even the implied warranty of
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
// GNU General Public License for more details.
// 
// You should have received a copy of the GNU General Public License
// along with this program.  If not, see <http://www.gnu.org/licenses/>.

/*
 * IndirectConstant.h
 *
 *  Created on: Dec 2, 2009
 *      Author: dhovemey
 */

#ifndef INDIRECTCONSTANT_H_
#define INDIRECTCONSTANT_H_

#include <cstdint>
#include "vm/Constant.h"

/**
 * Abstract base class for Constants which
 * reference other Constants.
 */
class IndirectConstant : public Constant {
private:
	uint16_t m_ref;

	IndirectConstant(const IndirectConstant &);
	IndirectConstant& operator=(const IndirectConstant &);

public:
	/**
	 * Constructor.
	 *
	 * @param type the ConstantType of the constant
	 * @param ref  constant pool index of the referenced Constant
	 */
	IndirectConstant(ConstantType type, uint16_t ref);

	/** Destructor. */
	virtual ~IndirectConstant();

	/** Get the constant pool index of the referenced constant. */
	uint16_t getRef() const { return m_ref; }

	virtual std::wstring asString(ConstantPool *cp) const;
	virtual bool compare(const Constant *other) const;

	virtual void read(DataInputStream *in);
	virtual void write(DataOutputStream *out) const;
};

#endif /* INDIRECTCONSTANT_H_ */
